AppMockUp - Create the most compelling screenshots for your app.
Design Details Podcast - A show about the people who design our favorite products.
JustRecruit.co - Easy to use, low-cost recruitment software and websites, perfect for start-ups, small and growing recruitment businesses
Tentative - Podcast about product design hosted by Thoughtbot designers
draw.io - Online diagramming application
Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.